package com.hjh.webdemo.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;

public class AuthorizationInterceptor implements  HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response, Object handler) throws Exception{
        if (request.getSession().getAttribute("loginUser")==null){
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();
            out.print("<script>" +
                    "alert('请先进行登录，再进行后续操作！（Filter控制）';" +
                    "location.href='"+request.getContextPath()+"/login.jsp';" +
                    "</script>");
            return false;
        }else {
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {

    }
}
